Home / 990,943.76-1,486,472.16-280,916

Finding the Fourth Proportional to 990,943.76, 1,486,472.16 and 280,916

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Solution

The fourth proportional to 990,943.76, 1,486,472.16 and 280,916 is: 421,390.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,943.76 : 1,486,472.16 = 280,916 : x
  2. Step 2: Convert to fraction form
    990,943.76/1,486,472.16 = 280,916/x
  3. Step 3: Cross multiply
    990,943.76x = 1,486,472.16 × 280,916
  4. Step 4: Simplify right side
    990,943.76x = 417,573,813,298.56
  5. Step 5: Solve for x
    x = 417,573,813,298.56/990,943.76
  6. Step 6: Final answer
    x = 421,390.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.